Method of apparatus for forming an object by means of additive manufacturing

A method of and an apparatus (1,29) for forming an object by means of additive manufacturing, the method comprising consecutively providing a plurality of layers (9) of building material (5, 6), and selectively curing one or more pixels (47) of each of the layers (9) during printing thereof. The method comprises a step of providing a first layer (9) of a first building material (5) onto a support surface (4, 30) or a preceding layer (9), and selectively exposing, in accordance with layer data, one or more pixels (47) in the first layer (9) to a dose of radiation (45, 45′). It further comprises the identifying, based on the layer data, of one or more contour pixels (47) in the first layer (9) that coincide with a contour of a featured region of a subsequent second layer (9), wherein the featured region of the second layer (9) is to be provided using a second building material (6) different from the first building material (5). The method also comprises increasing, prior to said selectively exposing, a radiation dose (45′) for the identified contour pixels (47). The step of selectively exposing includes exposing the one or more contour pixels (47) using the increased radiation dose (45′).